* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.top {
    display: flex;
    width: 100%;
    height: 162px;
    /* background-color: aquamarine; */
}

.logo {
    margin-top: 35px;
    margin-left: 150px;
    width: 116px;
    height: 116px;
    /* background-color: lightblue; */
}

.dh {
    margin-top: 100px;
    margin-left: 100px;
    width: 800px;
    height: 30px;
}

.dh li {
    height: 30px;
    list-style-type: none;
    float: left;
    margin: 10px;
    /* background-color: rgb(35, 172, 210); */
    text-align: center;
    line-height: height 30px;
    ;
}

.dh a {
    text-decoration: none;
    color: #666666;
}

.sign {
    margin-top: 25px;
    margin-left: 420px;
}

.na1 {
    margin-top: 3px;
    width: 100%;
    height: 458px;
    /* background-color: antiquewhite; */
}

.na1 img {
    width: 100%;
    height: 458px;
}

.na2 {
    margin: 0 auto;
    margin-top: 3px;
    width: 1400px;
    height: 480px;
    /* background-color: lightgray; */
    display: flex;
}
.na2_1{
    margin-left: 100px;
}
.na2_2{
    margin-left: 25px;
}

.na2_2 img{
    margin-right: 20px;
}

.na3 {
    padding-top: 30px;
    margin-bottom: 30px;
    margin-top: -30px;
    width: 100%;
    height: 450px;
    background-color: rgb(233, 236, 236);
}

.left {
    margin-right: 700px;
}

.right {
    margin-left: 850px;
    margin-top: -320px;
}

#h1 {
    padding-bottom: 30px;
    border-bottom: 1px solid rgb(151, 149, 148);
    width: 570px;
    margin-left: 140px;
}

.head{
    border-left: 4px solid rgb(186, 186, 178);
    padding-left: 5px;
    /* background-color: blue; */
}

#h2 {
    padding-top: 20px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgb(151, 149, 148);
    width: 570px;
    margin-left: 140px;
}

.na4 {
    width: 1400px;
    height: 350px;
    /* background-color: pink; */
    padding-top: 30px;
    margin-bottom: 30px;
    margin-top: -30px;
}

.md {
    margin-left: 130px;
    /* background-color: aqua; */
}

.md img{
    /* background-color: bisque; */
    margin-top: 20px;
    margin-right: 40px;
    width: 271px;
}

.bottom {
    width: 100%;
    height: 100px;
    background-color: rgb(199, 209, 209);
}
